Math, asked by DUBEYSHUB8062, 11 months ago

A cylindrical pillar of height is 14m and circumference of ots base os 154m find the cost of paintingthe pillar if the cost of p/msquare is rupees 150

Answers

Answered by dineshkumaryadav55
0

Answer:

rs. 3961650

Step-by-step explanation:

circumference of cylinder = 2πr

2πr = 154

2*22/7 *r = 154

44r / 7 = 154

r = 154 * 7 / 44

r = 49/2 metre

height of cylinder = 14 metre.

Area of cylinder = πr^2h

22/7 * 49/2 * 49/2 * 14

= 11 * 49 * 49

= 26411 metre square.

cost of painting 1metre sq. = rs. 150

cost of painting 26411 metre sq. =

26411 * 150 = rs.3961650

Hope it will be helpful for you.

Answered by gjenagjena66
0

Answer:

Rs3,23,400

Step-by-step explanation:

Fisrt we should know that, the curved surface of pillar is to be painted. So, we have to find the curved surface area.

CSA of cylinder

=2(pi)rh

Circumference=2(pi)r=154m .....(given)

Height =14m.......(given)

CSA = 154 × 14 = 2156m²

Cost of painting per mtr² =Rs150

Cost of painting 2156 mtr²= Rs 150 ×2156

=Rs 3,23,400

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